There are three critical indicators in the OPN.
AX1700DMT3C: Voltage
AX1700DMT3C: Maximum temperature
AX1700DMT3C: FSB Speed
The following codes mean the following:
Voltage
L: 1.50V
U: 1.60V
K: 1.65V
M: 1.75V
All Palominos have default voltage of 1.75V, so all Palominos have voltage code of "M." TBredAs have a default range of 1.5-1.65V. TBredBs have a default range of 1.6V-1.65V.
Maximum Temperature
T: 90C
V: 85C
All AMD processors with a rating less than 2200+ have a maximum temperature of 90C, so they're all "Ts." Anything above that has a max temp of 85C, so they're all "Vs." FSB Speed
C: 266MHz
D: 333MHz
Here's how these codes translate in real life with real chips:
1700+
Palominos: If the website you're ordering from shows an order code of AX1700DMT3C, that's a Palomino.
TBredA: If the website you're ordering from shows an order code of AXDA1700DLT3C, that's a Thoroughbred A.
TBredB: If the website you're ordering from shows an order code of AXDA1700DUT3C, that's a Thoroughbred B.
If you see a code like "AIUHB" that begins with the letter "A" on the second line of the processor codes, that's a high-end TBredB.
If you see a code like "JIUCB" that begins with the letter "J" on the second line of the processor codes, that's a low-end TBredB.
1800+
Palominos: If the website you're ordering from shows an order code of AX1800DMT3C, that's a Palomino.
TBredA: If the website you're ordering from shows an order code of AXDA1800DLT3C, that's a Thoroughbred A.
TBredB: If the website you're ordering from shows an order code of AXDA1800DUT3C, that's a Thoroughbred B.
If you see a code like "AIUHB" that begins with the letter "A" on the second line of the processor codes, that's a high-end TBredB.
If you see a code like "JIUCB" that begins with the letter "J" on the second line of the processor codes, that's a low-end TBredB.
1900+
Palominos: If the website you're ordering from shows an order code of AX1900DMT3C, that's a Palomino.
TBredA: If the website you're ordering from shows an order code of AXDA1900DLT3C, that's a Thoroughbred A.
TBredB: If the website you're ordering from shows an order code of AXDA1900DUT3C, that would be a Thoroughbred B.
If you see a code like "AIUHB" that begins with the letter "A" on the second line of the processor codes, that's a high-end TBredB.
If you see a code like "JIUCB" that begins with the letter "J" on the second line of the processor codes, that's a low-end TBredB.
However, AMD's datasheets do not currently show a 1900+ TBredB, and as of now (1/15/03), there have been no sightings of any. Since both the 1800+ and 2000+ TBredBs have a default voltage of 1.60V ("U"); it's very safe to say any 1900+ TBredB will also.
2000+
Palominos: If the website you're ordering from shows an order code of AX2000DMT3C, that's a Palomino.
TBredA: If the website you're ordering from shows an order code of AXDA2000DKT3C, that's a Thoroughbred A.
TBredA/B: If the website you're ordering from shows an order code of AXDA2000DUT3C, that could be either a Thoroughbred A or Thoroughbred B. The only way to distinguish between the two is by the stepping code.
All TBredAs have a stepping code which ends in "A," like "AIUGA." All TBredBs have a stepping code which ends in "B," like "AIUGB."
There's two listed TBredA types in the AMD techdoc. One uses 1.6V, the other uses 1.65V. The TBredB is solely 1.6V.
If you've determined a CPU is a TBredB, if you see a code like "AIUHB" that begins with the letter "A" on the second line of the processor codes, that's a high-end TBredB.
If you see a code like "JIUCB" that begins with the letter "J" on the second line of the processor codes, that's a low-end TBredB.
2100+
Palominos: If the website you're ordering from shows an order code of AX2100DMT3C, that's a Palomino.
TBredA/B: If the website you're ordering from shows an order code of AXDA2000DUT3C, that could be either a Thoroughbred A or Thoroughbred B.
All TBredAs have a stepping code which ends in "A," like "AIUGA." All TBredBs have a stepping code which ends in "B," like "AIUGB."
If you see a code like "AIUHB" that begins with the letter "A" on the second line of the processor codes, that's a high-end TBredB.
If you see a code like "JIUCB" that begins with the letter "J" on the second line of the processor codes, that's a low-end TBredB.
2200+
TBredA: If the website you're ordering from shows an order code of AXDA2200DKV3C, that's a Thoroughbred A.
TBredB: If the website you're ordering from shows an order code of AXDA2200DUV3C, that's a Thoroughbred B.
If you see a code like "AIUHB" that begins with the letter "A" on the second line of the processor codes, that's a high-end TBredB.
If you see a code like "JIUCB" that begins with the letter "J" on the second line of the processor codes, that's a low-end TBredB.
2400+
Sorry, no exciting choices here (yet). They're all TBredBs, and they'll have an order code of AXDA2400DKV3C.
Yes, the DKV part is the same as for the 2200+. That's because a TBredA runs at 1.65V (that's what the "K" stands for) at 2200+. A TBredB runs at 1.6V (that's what the "U" stands for) at 2200+ and 1.65V at 2400+ and above.
2600+
These are all TBredBs, too, but just in case "which one I am getting" is getting old, the 2600+ gives you a new, different challenge: What Speed Am I Getting? There will be two 2600+s, but they'll run at different speeds. Since the 333MHz bus helps performance, AMD figured (correctly) that a CPU running at a slightly lower speed and higher bus was the same as a CPU running at a higher speed and a lower bus.
The 2600+, 266MHz version, will run at 2133MHz.
The 2600+, 333MHz version, will run at 2083MHz.
We'll no doubt see more situations like this as the number of 333MHz processors expands.
The way you tell these apart by OPN is that the 266MHz processors will always have an OPN that ends in "C," while the 333MHz processors will always have an OPN that ends in "D."
Next spring, we'll get more of the same when Bartons show up. You'll have Bartons and TBreds running at the same speed, too.
got them from this site
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